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An invoice is written by one salesrep but a salesrep writes many invoices An invoice can contain one or more line items of products A
An invoice is written by one salesrep but a salesrep writes many invoices
An invoice can contain one or more line items of products
A sales rep can sell one or more products
A vendor sells many products but a product is bought from one vendor
An invoice has one or many products and a product is found on zero, one or many invoices
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Relational Theory For Computer Professionals What Relational Databases Are Really All About
Authors: C J Date
1st Edition
1449369464, 9781449369460
